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Description

The MAX19711 is an ultra-low-power, highly integrated mixed-signal analog front-end (AFE) ideal for CDMA communication applications operating in full-duplex (FD) mode. Optimized for high dynamic performance and ultra-low power, the device integrates a dual 10-bit, 11Msps receive (Rx) ADC; dual 10-bit, 11Msps transmit (Tx) DAC with CDMA baseband filters; three fast-settling 12-bit aux-DAC channels for ancillary RF front-end control; and a 10-bit, 333ksps housekeeping aux-ADC. The typical operating power in FD mode is 37.5mW/42.7mW at a 4.915MHz/11MHz clock frequency. The Rx ADCs feature 54.8dB SNR and 74.2dBc SFDR at 1.875MHz input frequency with an 11MHz clock frequen cy. The analog I/Q input amplifiers are fully differential and accept 1.024VP-Pfull-scale signals. Typical I/Q channel matching is ±0.01°phase and ±0.01dB gain.

Features

1. Dual 10-Bit, 11Msps Rx ADC and Dual 10-Bit, 11Msps Tx DAC
2. Ultra-Low Power
3. Low-Current Standby and Shutdown Modes
4. Integrated CDMA Filters with > 64dBc Stopband Rejection
5. Programmable Tx DAC Common-Mode DC Level and I/Q Offset Trim
6. Excellent Dynamic Performance
  (1) SNR = 54.8dB at fIN = 1.875MHz (Rx ADC)
  (2) SFDR = 75dBc at fOUT= 620kHz (Tx DAC)
7. Three 12-Bit, 1µs Aux-DACs
8. 10-Bit, 333ksps Aux-ADC with 4:1 Input Mux and Data Averaging
9. Multiplexed Parallel Digital I/O
10. Serial-Interface Control
11. Versatile Power-Control Circuits Shutdown, Standby, Idle, Tx/Rx Disable
12. Miniature 56-Pin Thin QFN Package (7mm x 7mm x 0.8mm)